Pre-heat a large skillet over medium low heat on your stove. Add the sesame seeds, chili flakes and peppercorns to the pan. Toast for 2 to 3 minutes stirring often and ensuring that they don't burn. Pour on a plate to cool.

Add the orange peel to the pan and toast for 2 minutes. Pour onto the plate and let cool.

Once all of the ingredients are completely cooled down, grind them in a spice grinder. Work in batches if needed. If the sesame seeds don't completely turn into powder form, this is completely fine.

Mix the spices together well and store in an airtight container until needed. If stored properly in a cool dark pantry, it will keep its freshness for around 2 months.